Concrete-mixer.



PATENTED SEPT. 17, 1907.

A. R. PARKER. CONCRETE MIXER. APPLIUATION FILED Mun. 1907.

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I ALLEN R.' PARKER, OF AKRON, OHIO.

CONCRETE-MIXER.

-Specification of Letters Patent.

Patented sept. 17, 1907.5

Application filed May 17,1907. Serial No. 374,197.

To all 'whom it may concern:

Be it known that I, ALLEN R. PARKER, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Concrete-Mixers, oi which the following is a speciication.

This invention relates to devices for making concrete and other compounds wherein a due admixture of various component parts are placed together and thoroughly intermingled by means of continuous agitation.

The object of this invention is to provide new and effectual means intended for use in mixing cement, sand and water, or cement, rock, sand and water, for the purpose of producing concrete.

A further object of this invention is to perfect a machine which can be easily transported from place to place, and adapted to be operated either by hand or machine power and so constructed that it may be turned to receive the load of material to be mixed and afterwards turned in some other position for the purpose of dumping.

The invention further contemplates the production of a strong, simple, serviceable and efficient device for the purpose indicated.

A practical embodiment of my invention is illustrated in the accompanying drawings, in which similar reference numerals indicate like parts in the different igures.`

In the drawings, Figure lis a perspective view of the front of my machine; Fig. 2 is a side elevation of the same showing a mixing-pan in the position which it as-A sumes when discharging; and, Fig. 3 is a perspective view of the rear of the machine.

In the drawings, the reference numeral l denotes a cruciform frame provided with an encircling strengthening member 2 having on its upper surface a circular track 3, lor a purpose to be later described.

Supcrposed on the frame 1 is a second frame comn -poscd of members 4 and 5 intersecting each other. Connecting the lower or stationary frame l `to the upper or revoluble frame composed of the two members 4 and 5, fis a pin G adapted to constitute a pivot whereon the upper frame may revolve. The under faces of the arms 4 and 5 are provided with shoes 7 (see Fig. 2) arranged to slide upon the circular track 3 to keep the upper framel j-..jsteady and to reduce friction incident to its movement. "Mounted on the members 5, 5, are a pair of bearings S, 8,

in'which is mounted a rotatable shaft 9 on which is hinged the lower ends of a pair of preferably parallel arms 10. These arms 10, 10 are united by cross arms 1l and 12, both for the purpose of strengthening the structure and for other purposes to be later described. The cross arm 11 is further strengthened by braces 13, 137 and is provided approximately centrally with a bearing 14 adapted to receive a pin 15 arranged to project and form the axis of a rusto conically-'formed mixingpan 16 mounted thereon. This mixing-pan` 16 visv supported near the bottom by a pair of friction-'reducing rollers 17 suitably mounted on the cross arm 12 and is i provided on its interior with a plurality of blades 18 secured to the side 19 and bottom 20 of the mixing-pari means of bolts or rivets 2l. The configuration of'these blades is such that when the mixing-pan is revolvedin the direction of the arrow in 1, the material placed therein will be engaged by the-biadcs successively and carried upwardly towards the upper portion thereof, from whence it is permitted to return across the' bottom of the mixing-pan until it reaches th'e lower` portion thereof to be again raised as before. This tumbling of the material placed within the mixing-panausesfa thorough intermingling of the ingredients of the mxV until it has attained the proper consistency-to ,be emptied therefrom. In order to revolve the mixingpan 16 there is placed on the rear of the bottoni-2O thereof circular rack teeth 22 into which is arranged tomesli'a spur gear 23 mounted on a shaft 24 rotatablyrsustained in a bearing 25 on the rear face of one of the upright 10 and by means of a second bearing 26 secured Yto the ,A

rear face oi the cross arm 11. The shaft 24 is also prof vided with a Crank 27 by which the' revoiutn lfaire gear wheel 23 may be accomplished by hand. 'lIn order to revolve the mixing pan 16by power from' some source, there is mounted on the shafty 24 a sprocket wheel 28 from which runs a link belt 29 to a sprocket wheel 30 mounted on the shaft 9 outside of one of the bearings 8. This shaft 9 also bears a pulley 31 arranged to receive a belt 32 for conveying power from any preerred source. In order to receive the belt 32 andmsustain it when not operating the pulley 31, an idler pulley 33 is provided, arranged when the members are in the position indicated in Fig. 1 to be adjacent to the pulley 31 and in alinement therewith. This pulley 31 is mounted on a stub shaft 34 supported by a journal bracket 35 mounted on a suitable lsupport 36 projecting from the circular member 2. I In order to sustain the mixing-pan 16 in an inclined position and to empty the 'same when desired, "thej f ollowing mechanism is employed; Mounted on oil-e of the members 4 of the revoluble frame of the device is a standard 37, to the upper portion of which is pivoted a lever 38 having pivotally connected to its lower end an arm 39, in turn pivotallyfconnected to a biurcated y yoke 40 attached toy straps '41 on the rear face of the cross arm 1l. In the lower portion o the standard 37 are formed a plurality of rack teeth 42 adapted to be engaged by the lower end of a locking lever 43 carried by the lever 38, so that when the mixing-pan 16 is in`approximately the position shown in Fig. 3 a limited amount of variation may be obtained with respect to the inclination of the pan by inserting the locking lever in different teeth of the rack 42. Secured on the upper face of the circular member 2 and preferably inlating the lever 3S in the manner shown in Fig. 2 the by said revoluble side oi the traclir 3 is a spring stop 44 constituting an abutment. This spring stop 44 consists simply oi a sheet of spring metal secured to the member 2 with a normal tendency to spring upwardly into the path traversed by the frame 5 in its rotation over the track 3. When the frame pivoted on the-pin (i is swung in one direction, the bars constituting the frame, will ride over and depress the spring member and the member will in no wise interrupt the revolution thereof; but if the frame composed oi the members 4 and 5 is turned in a reverse direction the spring member 44 will engage the rear faces oi these members and prevent their iurther revolution in the reverse direction. This spring member 44 is so positioned that it constitutes an abutment against which the end oi the member 5 which bears the pulley 31 may rest when the pulleys 31 and 33 are in alinement with one another, so that when the belt 32 is shifted from the pulley 33 to the pulley 3i the pull of the belt on the pulley 31 will not cause a reverse rotation oi the revoluble frame, due to the presence of this abutment 44. lt will be obvious oi course that the member 44 does not prevent absolutely all movement of the revoluble frame in a reverse direction, but as soon as either one of the cross members 4 encounters it further movement is prevented.

The operation oi the device is as follows: 1n iilling the mining-pan 16 with the material to be mixed, it is preierably placed in approximately the position shown in Figs. 1 and 3 and revolved by means of the crank 27, if the device is to be operated by manual power, and in this event, the position of the upper irame with respect to the alining of the pulleys 31 and 33 is immaterial; but if the machine is to be operated by power, the upper frame will be swung into thc position shown in Fig. 1, with the pulleys in alinement and the bar 5 abutting against the stop 44. lhe belt v3:2 may then he shifted from the'idler pulley 33 to the pulley 31 by which the revolution of the hopper ispattaincd. ln order to discharge the contents oi the mixing-pan where manual power is employed as the motive power, the frame is swung into a position to cause the mixing-pau to discharge its contents at a proper place, and by manipumi'xng-pan will be easily tilted as to cause the contents tliereoi to be discharged thercirom. when the machine is being operated by power irom a belt, it will be first necessary to transfer the belt i rom the pulley 31 to the idler 33 beiore the mixing-pan can be swung preparatory to dumping.

lhat I claim and desire isz- 1. A device of the class described comprisingY n supportfrarne suitably mounted for horizontal revolution. a tilting frame on said revoluble frame. a revoluble mixingpan carried by said tilting frame, a standard mounted on said revoluble frame. a lever pivotally mounted on said standard, means for connecting said lever with said tilting,` frame, whereby the inclination of said tilting frame may be varied when said lever is manipulated. and means for revolving said mixing-pan.

2. A device of the class described comprising a supporting frame suitably mounted for horizontal revolution, a tiltable frame pivotally mounted on said revoluble frame, a revoluble mixing-pan carried b v said tiltable frame, means for revolving said mixing-pan. a stand-.1rd carried frame, a lever mounted on said standard,

to secure by Letters Patent,

mechanism for connectig'said'lever with said tiltable frame, whereby said tiltable frame may be varied in inclination by the manipulatiomof said leyer, and a lock to arrest the movement of said lever and frame.

2i. A device ot' the class described comprising a supporting frame suitably mounted for horizontal revolution, a. revoluble shaft carried by said frame, a pulley carried by said shaft, a tiltable frame pivotally secured to said shaft, means for varying the inclination of said tiltable frame, a mixing-pan carried by said tiltable frame, a shaft rotatably mounted on said rotatable frame. means carried by said shaft for engaging said mixing-pan for producing revolution thereof, and means for communicating motion from one of said shafts to the other, whereby the revolution of said mixing-pan will conform to the revolution of said pulley.

4. A device of the class described comprising a revoluble frame suitably mounted for horizontal revolntionf a shaft rotatably mounted on said frame, a tiltable frame pivotally mounted on said shaft, a revoluble mixing-pan carried by said tiltable frame. an annular gear rack on said mixingpan. a shaft carried by said tiltable frame, a spur gear on said shaft adapted to mesh with the annular gear rack, a sprocket wheel carried by said shaft. a sprocket wheel mounted on the shaft on which said tiltable frame is mounted. means connecting said sprocket wheels, whereby said shafts are revolved in unison, and means for communicating motion to said first mentioned shaft for causing the revolution of said mixing-pan.

.'v. A device of the class described comprising a s tationary frame. a revoluble frame superposed thereon, a tiltable frame pivotally mounted on said revoluble frame, a mixingpan carried by said tiltable frame, means to vary the inclination of said tiltable frame, means to revolve said mixing-pan and a spring abutment adapted to lie in the path of said revoluble frame and engage said frame and prevent complete revolution thereof in one direction.

(i. A device of the class described comprising a stationary frame. an annular track mounted on said frame, a revoluble frame superposcd on said stationary frame adapted to be revolved on said track, a tiltable frame hinged on said revoluble frame, means to varypthe inclination of said tiltable frame, a revoluble mixing-pan carried by said tiltable frame, means for revolving said mixingpan. a spring abutment adapted to lie in the path of said revolubl(` frame and be depressed by said frame and inoperative when said revoluble frame is turned in one direction and arranged to constitute a stop for preventin.;r complete reverse revolution of said frame in an opposite direction.

T. A device of the class described comprising a stationary frame. an idler pulley suitably supported by said frame. a revoluble frame superposed on said stationary frame, a rotatable shaft mounted on said revoluble frame, a pulley mounted on said rotatable shaft, a tiltable frame hinged ou said rotatable shaft, a revoluble mixing-pan carried b v said tiltable frame` means for causing the revolution of said mixing-pan. means for transmitting motion from said rotatable shaft to the means for revolving said mixing-pan. and means for arresting,r the revolution of said revoluble frame.

S. A device of the class described comprising a stationary frame. an idlerpulley supported by said stationary frame. a revoluble frame superposed on said stationary frame. a shaft carried by said revoluble frame. a pulley on said shaft so positioned as to aline and register with said idler pulley. an upwardly-extending frame mounted "hn said revoluble frame. a revoluble mixing-pan carried by said upwardly-extending: frame, and means for communieating motion from the pulley carried by said revoluble frame to said mixing-pan, whereby said mixing-pan may be revolved.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ALLEN R. PARKER.

Witnesses 1 C. E. lluiirnnnr, GLENARA FOX, 

